Performance of frequency hopped Mary FSK in Rayleigh fading and partialband jamming
Abstract
Military satellite communications systems must have waveforms that ensure reliable performance during jamming and fading situations. An analysis is provided for the performance of Mary frequency shift keying (FSK) in the presence of system noise, using the Rician fading model. Frequency hopping and worstcase partialband noise (PBN) jamming are then added to the model and analyzed. Results are displayed showing the worstcase values of the bit error rate (BER) as a function of the signal to jamming ratio (SJR). A straightline relationship is observed, as was also seen for Rayleigh fading without jamming. The jammer fill fraction and the BER are shown as a function of the fixed to scatter ratio F for a fixed value of the signal to noise ratio and SJR. For high values of F, the Gaussian model may be assumed and a low value of jammer fill fraction is needed to achieve the worstcase result. For low F, the Rayleigh model may be assumed and broadband jamming is the optimum strategy. For intermediate F values, the Rician model can be assumed. A rapid transition is shown through the few decibels separating the worstcase PBN jamming Gaussian result and the Rayleigh fading result. The ratio F can be considered as a singleparameter bridge beween the worstcase PBN jamming straight line in the Gaussian model and the Rayleigh fading straight line.
 Publication:

Electrical and Computer Engineering, Volumes 1 and 2 4 p (SEE N9330215 1131)
 Pub Date:
 1990
 Bibcode:
 1990ecev.confT....L
 Keywords:

 Frequency Hopping;
 Frequency Shift Keying;
 Jamming;
 Satellite Communication;
 Signal Fading;
 Electromagnetic Noise;
 Mathematical Models;
 Communications and Radar